Ring gears options
#1
Ring gears options
(refers to 7" ring gear rears only)
So a common swap is the Kia 4.78 ring and pinion or the entire 3rd member. But I'm looking into other factory gear options. The NA FC also has a 7" ring gear. So could you use NA FC rear end chunks in GSL-SE rear end?
I know you can bolt the 94-97 Maita 3rd member into a 84-85 Rx7 housing without any other mods also. But what are the gear options?
So a common swap is the Kia 4.78 ring and pinion or the entire 3rd member. But I'm looking into other factory gear options. The NA FC also has a 7" ring gear. So could you use NA FC rear end chunks in GSL-SE rear end?
I know you can bolt the 94-97 Maita 3rd member into a 84-85 Rx7 housing without any other mods also. But what are the gear options?
#2
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I don't know if this link has all the information that you are looking for but should be a good start. To find more info just search with the term "Miata" and use the advanced search option to see the threads with the most responses.
https://www.rx7club.com/showthread.p...ighlight=miata
https://www.rx7club.com/showthread.p...ighlight=miata
#3
That is a great link. But what I really want to know is if you can swap ring and pinions between 1st gen GSL-SE rears and NA FC diffs? Or my actual goal is the Kia 4.78 ring and pinion into the NA FC diff...
I want to use the 4.78 from the Kia like the 1st gen guys do. But i want to use it in my NA FC diff. I know that they are both 7" ring gears. I have been told in the past that if you break your GSL-SE rear, the 3rd member from the NA FC diff will work just fine. Leading me to believe that the Kia ring and pinion could also work in the FC diff...???
I want to use the 4.78 from the Kia like the 1st gen guys do. But i want to use it in my NA FC diff. I know that they are both 7" ring gears. I have been told in the past that if you break your GSL-SE rear, the 3rd member from the NA FC diff will work just fine. Leading me to believe that the Kia ring and pinion could also work in the FC diff...???
#4
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I'm too lazy to look myself, but check out Mazdatrix or RB websites and see if they have different part #'s for 84-85 SE's and the FC rings. Many times the parts (like clutches) are listed 84-91.
#6
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I went with racingbeats 4.875 installed in my GSLSE rear diff. Absolutely love them! Actually hooks better and launches great. I lose 1000 rpm on the highway but a S4 or S5 n/a tranny will compensate for about 500 rpm. I have one but I am waiting for mine to break to make the swap worthwhile as i don't mind the highway rpm since I do mostly all city driving.
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